Liquid-shaking apparatus



Dec. 10, 1929. D. BLAIN 1,739,349

LIQUID SHAKING APPARATUS Filed Jan. 6, 1928 INVENTOR. Daniel Elwin A TTORNE Y5 Patented Dec. 10, 1929 UNITED STATES DANIEL BLAIN, OF NASHVILLE, TEIWNESSEE LIQUID-SHAKING APPARATUS Application filed January 6, 1828. Serial No. 245,027.

This invention relates primarily to laboratory apparatus, and more particularly to apparatus used to shake liquids.

Its primary object is to shake blood pipettes.

It is of the objects of this invention to provide means whereby auniform and steady agitation may be given laboratory apparatus.

It is also of the objects of this invention to provide such an agitating means that will perform its function without constant watching, thereby saving a great amount of time.

Another object is to provide such a device that is of such simple construction and so free from complicated parts that skilled attendance thereon is not necessary.

In the drawing which shows one form that my invention may take, the figure is a perspective view of my said invention.

ing, 5 is a suitable base on which is centrally located a stud bearing shaft 6. Mounted on said shaft 6 is the arm 7 on either or both ends of which is a support 8 on which are suitably secured spring clips 9 adapted to hold the container, or containers 10 of the material to be shaken or agitated. In the instant case, these containers are shown as blood pipettes.

The means for actuating the device comprises a solenoid 11, mounted on base 5, electrically energized through leads 12, and a spring 13 secured at 14 to arm 7. Said spring 13 is capable of being varied in tension by the adjusting screw 15 mounted in bracket 16. A cushioning means is provided which consists of a spring 17 mounted on arm 7, and an abutment or stop 18, controlled by screw 19.

The operation of my device is as follows. The current is switched on and solenoid 11 is energized which in coaction with spring 18 causes arm 7 to oscillate, the period of oscillation being determined by the tension of a spring 13. This oscillation causes a more or less violent agitation of the contents of the containers 10. Too violent agitation is prevented by the cushioning means 17 and 18 and the correct amount of agitation is assured by proper adjustment of the gap by means of screw 19.

Having thus fully described my invention,

Referring more specifically to said drawand its mode of operation, what I claim is:

1 A clinical agitator comprising in combination resilient means for holding the substance to be agitated, an arm to support said means mountedon a vertical axis, means for imparting an oscillating motion to said arm,

and means operatively connected with said arm between sald holding means, and said axis whereby the period of oscillation may be varied.

2. A chmcal agitator comprising means for holding the substance to be agitated, an arm ,to'support said holdlng means, electrical means for imparting an oscillating motion to said arm, means for varying the period of oscillation of said arm, and resilient means for cushioning the oscillating action of said arm.- r

3. A clinical agitator comprising a base, a vertical axis, an arm mounted on said axis,

resilient means mounted on said arm to hold a pipette parallel with said arm, and means for imparting an oscillating motion to said arm.

4. A clinical agitator comprising a base, a vertical axis, anarm mounted on said axis, resilient means mounted on said arm to hold a pipette parallel with said arm, means for imparting an oscillating motion to said arm, and

means operatively connected with said arm 0 between said holding means and said axis whereby the period of oscillation may be varied.

5. A clinical agitator comprising a base, a vertical axis, an arm mounted on said axis, resilient means mounted on said arm to hold a pipette parallel with said arm, means for imparting an oscillating motion to said arm, and an adjustable spring tension means mounted on said base and operatively con one side of said axis, and an adjustable tension means operatively connected with said arm at a pointremote from said axis comprising a bracket having a threaded aperture therein, an adjusting screw mounted in said aperture, and a tension spring having one end secured to said arm and the other end to said screw.

7. A clinical agitator comprising'a base, a'vertical axis thereon,"a n arm midway-its length journaled on said axis, members mounted on each end of said 'armeabhmemher being provided with a plurality of resilient means for holding pipettes parallel with said arm, means for imparting an oscillating motion "to said arm'mo'unted at one "side" of said axismnd an adjustable'tension'means operatively connected with said arm at a point remote from said axis comprising a bracket havinga threaded aperture th'erein, anad- .justing scr'ewmounted in said 'aperture,- and a tension spring'havingone end secured to said arm and the other end to said'screw.

8. A clinical" agitator comprising a base, a vertical axis thereon, an arm midway its length journale'd' "on' said axis, "members mounted 'oneach'end ofsaid arm, each memher being provided with a pluralityof pairs of open resilient clips; each pair of clips bemg adapted'to hold a' pipette parallel with 1 said arm, elctri'cahmeansfOr imparting an oscillating motion to"said arm' mounted at one side of said axis, resilient cushioning means for said'arm, and an adjustable ten- '35 sion means operativelyiconnectedwith said arm at a'point remote fr'o'm'said axiscom- 'pris'ingbracket', an adjusting screw 'mo'unted therein, and a tension spring connecting said screw and said arm.

40 "DANI'ELBLAIN. 

